PKG_CPPFLAGS  =  -D_FOR_R -D_USE_MERSENNE_TWISTER -D_ENABLE_CEREAL
PKG_CXXFLAGS  =  $(SHLIB_OPENMP_CXXFLAGS)
PKG_LIBS      =  $(SHLIB_OPENMP_CXXFLAGS)
CXX_STD       =  CXX11